Steam-boiler and furnace.



T. KEMER.

STEAM BOILER AND PURNAGE. APPLICATION FILED JULY 11, 1910.

1,1 32,778. Patented Mar. 23, 1915.

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T. KERNBR.

STEAM BOILEB. AND PUENAGE. APPLIoATIoN H'LBD JULY 11,1910.

1,1 32,778. Patented Mar. 23, 1915 Z SHEETS-SHEET 2.

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THE NORRIS PETERS C0., PHoTo-LlTHo.. WASHINGTON. D. f;A

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' THEODORE KERNER, OF MILWAUKEE, WISCONSIN.

STEAM-Beinen AND summon.

Application filed July 117 191.0. Serial No. 571,328.

fullestl extent the heating surfaces ofthe boiler shell and Hues and absorbing all the available heat of the products of combustion.

It consists in the construction, arrangement and combination of partsV as herein after particularly described and Hnally de- Hned in the claims.

In the accompanying drawing like characters designate the same parts in the several Hgures. l

Figure l is a vertical longitudinal section of a boiler and furnace embodying the in-v vention; Figs. 2, 3 and 4 are vertical cross p sections of the same on the lines 2, 3 3 and 4 4 respectively, Fig. l; Fig. 5 is a vertical longitudinal section on the line 5 5, Fig. 6 of the rearvportio'n of a boiler and furnace showing a modiication of the smoke stack or escape Hue connection; and Fig. 6 is a vertical cross section of the saine on the lline 6 6, Fig. 5.

Referring to Figs. l to 4 inclusive, a designates a substantially cylindrical boiler shell inclosed in a brick setting or other suitable casing forming an arch Z9 over and close to the upper part of the shell and side walls c upon which the boiler is supported in any suitable manner, for example, as shown in Figs. 2, 3 and .4, by saddles or brackets d. An internal fire box e is provided in the front part of the boiler and surrounded at the top, sides and ends by water circulating spaces. f is the feed door'opening into the Hre box. Below the, Hre box the boiler shell is cut away to provide for the upper part of the ash pit g above which thegrate bars h are located, resting at their front ends on the brick settingorvfront wall of the furnace and at their rear ends upon a water back z'. 'A Hue chamber j extends transversely through the lower part of the boiler adjacent to the fire boxe and ash pit g, be-

ing separated therefrom by a water leg c which forms an upward continuation of the water back z'. At the rear end of the boiler a Hue chamber Z is inclosed in the shell a orV a continuation thereof. The upper part ofn this chamber is connected by longitudinal tubular Hues m with the rear end of the fire box e, andthe lower part is connected by tubular return Hues n with the front Hue chamber j. The side walls 0 of the brick setting or boiler inclosure form along the lower part and outside of the boiler shella Hue o, which communicates at its front end with the front Hue chamber At the rear end it connects in the present case by a passage p below the Hoor level Specification of Letters Patent. Patented B131', 23;, 1915,

with the smoke stack or escape Hue g. The

Hue o which extends upwardly on the sides of the boiler shell to the saddles or bracketsI d, enveloping a large portion of its external' surface, is of considerably greater cross sectional area than the combinedcross sectional area of all the return Hues n, and thus Opf crates to retard the How of gases underneath the boiler to the smoke stack or escape Hue, giving them time to import their heat to the boiler shell and incidentally permitting soot to separate from the gases and settle, thereby acting as a smoke arrester. A direct Hue connection r, provided with a valve s for opening and closingI itV at will, is made between the upper part of the rear Hue cham? ber Z and the smoke stack or escape Hue g., The Hue chamber Zis provided at its rear end'with an opening and a door or doors t through which access is had to said chamber and the Hues m and a opening into it, for the purpose of Vcleaning them. The'` upper part of the water back z' is connected withY the lower part of the water leg by pipes or passages u, as shown in Figs. land 2Q A feed water pipe o passing through the Hueo below theflue chamber connects with the lower part of the water back t' and also withy the lowerl part of the boiler behind the chain# ber j. A drain pipe w connectswith the lower part of the boiler, and a drain pipe m connects with the lower part of the water back z'. y is a steam orghot water delivery pipe connecting with the upper part of the boiler. The ash lpit is provided` with the usual clean out and draft opening a.

ln the normal operation of the boilerV and furnace the heated products of combustion pass from the Hre box as indicated by arrows on Fig. 1, first through the upper Huesm into the chamber Z, thence forward through the lower flues a in the lower part of the boiler into the chamber j and thence back through the flue 0 along and in contact with the outside and lower part of the boiler shell by way of the passage p into the smoke stack or escape flue Q. 1n this way all the available heat produced by the combustion of the fuel is mostV effectively utilized to raise the temperature of the water in the boiler, the hottest gases passing through the upper' flues fm, which are in contact with the hottest portion of the water in the upper part of 'the boiler, the cooler' gases returning through the lower flues n in contact with the cooler portion of the Awater in the intermediate and lower parts of the boiler, and the waste gases escaping through the fiue 0 along the lower part and outside of the shell a in contact with the coolest portion of the water in the boiler. rlhe temperature of the feed water on its way into the boiler is gradually raised as it passes through that portion of the pipe o exposed to the escaping products of combustion in the flue 0 and through the water back 'Z and water leg ZC, which are exposed on the front side to the heat of the fire in the furnace and on the back side to the heated products of combustion passing through the chamber To facilitate starting a fire in the furnace or fire box e the valve s may be opened, thereby establishing a direct draft between the fiue chamber Z and the smoke stack g. r1`he products of combustion will then pass as indicated by dotted arrows on Fig. 1, from the upper tubes fm through the chamber Z and pipe 1' into the smoke stack without returning through the lower flues n. When the fire is well started, the valve s is closed and the products of combustion pass in a sinuous course back and forth through and underneath the boiler as first explained, imparting their heat first to the hottest, then to the cooler and finally to the coolest portions of the water contained in the boiler.

Referring to Figs. 5 and 6, the lower end of the smoke stack or escape flue g is branched and its branches straddle the flue chamber Z, opening at their lower ends into the rear end of the flue 0 on each side of the boiler. A direct draft opening controlled by a valve s is provided between the upper part of the chamber Z and the smoke stack or escape flue g. This modified arrangement operates substantially like that shown in Fig. 1, the course of the products of combustion both for the indirect and the direct draft being indicated by arrows.

Various changes in minor details of con struction and arrangement of parts may be made without departing from the principle of the invention.

By the term steam boiler 7 as herein employed, it is intended to include a boiler for simply heating water as well as a boiler for converting water into steam.

1 claim:

1. 1n a steam boiler and furnace the combination of the boiler shell, an inclosure fornr ing a ue along the lower part and outside of the shell, a flue chamber at the rear end of the boiler, a fire box at its front end, a flue chamber adjacent to its front end communicating with said flue, upper flues extending lengthwise through the shell from the fire box to the rear flue chamber, lower flues extending lengthwise through the shell from the rear flue chamber to the front flue chamber, and an escape flue leading out of said lower outside flue which is of greater area in cross section than the combined cross sectional area of the lower internal flues.

2. In a steam boiler and furnace the combination of the boiler shell having an internal fire box at the front end and a flue chamber in the lower part thereof ladjacent to the fire box, a flue chamber at the rear end, an inclosure forming a longitudinal flue along the outside and lower part of the shell in communication with the front Hue chamber, an escape flue leading from said flue, upper flues extending through the boiler from the fire box to the rear flue chamber, and lower fiues extending through the boiler from the rear flue chamber to the front flue chamber, said outside due being of greater cross sectional area than all the lower internal flues and serving as a soot separating and smoke arresting chamber.

3. 1n a steam boiler and furnace the com-- bination of the boiler shell having a transverse flue chamber in the lower part thereof adjacent to the front end, a fire box adjacent to and extending above said chamber, a flue chamber at the rear end of the boiler, an inclosure forming a longitudinal flue along the lower part and outside of said shell in communication with the front flue chamber, iiues extending through the boiler from the fire box to the rear flue chamber, return flues extending through the boiler from the rear fiue chamber to the front flue chamber, an escape flue leading from said lower outside flue and a valve controlled direct flue connection with the rear escape flue chamber, said outside fiue being of greater cross sectional area than all said return flues and serving as a soot separating and smoke arresting chamber.

t. 1n a steam boiler and furnace the combination of the boiler having an internal fire box at the front end, a iiue chamber at the rear end and a transverse Hue chamber in the lower part behind the re box and separated therefrom by a water leg, an ash pit below the lire box, an inclosure forming a longitudinal 'flue along the lower part and outside of the boiler in communication with the front Hue chamber, a water back between the ash pit and the lower outside Hue and below said water leg, a circulating connection between said water back and water leg, a feed water connection with the water back, Hues extending through the boiler from the Hre box to the rear Hue chamber, return Hues extending through. the boiler from the rear Hue chamber to the front Hue chamber, and an escape Hue leading from said lower outside Hue, said outside Hue being of greater cross sectional area than all of said return Hues.

5. In a steam boiler and furnace the combination of a boiler having a fire box at the front end, a Hue chamber at the rear end and a transverse Hue chamber in the lower part adjacent to the fire box, an inclosure Vforming a Hue along the lower part and outside of the boiler communicating at one end with the front Hue chamber, upper Hues extending through the boiler from the Hre box to the rear Hue chamber, return Hues extending through the boilerl from the rear Hue chamber to the front Hue chamber, an escape Hue having branches extending downwardly around the rear Hue chamber and communicating at their lower ends with the lower outside Hue, and a valve `controlled direct draft opening between said escape Hue and the rear Hue chamber.

In witness whereof Ifhereto affix my signature in presence of-two witnesses.

` THEoDoRE KERNER.

Witnesses:

CHAs. L. Goss, ALICE E. Goss.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patentsi Washington, D. C. 

